CN107758850A - Activated sludge treatment method in sewage disposal - Google Patents

Abstract

The invention discloses a kind of activated sludge treatment method in sewage disposal, the typical process flow of activated sludge process is by aeration tank, second pond, aerating system, sludge reflux and excess sludge discharge five parts composition, waste water and the activated sludge of backflow enter aeration tank and form mixed liquor together, aeration tank is a bioreactor, air is filled with by aerator, oxygen in air dissolves in mixed liquor, produce aerobic metabolism state, muddy water mixed solution in subsequent aeration tank flows into second pond, carry out mud-water separation, active pollution index sinks to bottom of pond, water after mud-water separation is as processing water discharge second pond, the sludge that second pond settles down returns to aeration tank mostly as returned sludge, referred to as returned sludge, remaining is then excluded from sedimentation basin, this partial sludge is referred to as excess sludge.This method can keep the activity of sludge in Treatment of Sludge so that sludge can come into operation immediately, ensure that sludge meets requirement, reduce the stand-by period.

Description

Activated sludge treatment method in sewage disposal

Technical field

The present invention relates to a kind of method, more particularly, to a kind of activated sludge treatment method in sewage disposal.

Background technology

Sewage, it is often referred to discharge water necessarily polluted, from life and production.Sewage mainly has sanitary sewage, work Industry waste water and early-stage rainwater.The ill pathogen contaminant of major pollutants, oxygen consumption pollutant, plant nutrient and the poisonous dirt of sewage Contaminate thing etc..According to the viewpoint of sewage source, sewage can be defined as from the discharge of house, office, business or industrial area and ground The liquid or water that carry waste of the mixing such as lower water, surface water, snowstorm.Sewage is correspondingly reduced dirty by many classifications Influence of the water to environment also has many technologies and technique.According to sewage source, sewage can be divided into this four class.The first kind:Industry Sewage of the waste water from manufacturing, mining and industrial production activities, including lived from the runoff stored, processed with industry or business Leachate site, and it is other be not sanitary sewage waste water.Second class:Sanitary sewage is from house, office building, office or similar As sewage;Hygienic sewage;The industrial wastewater mixed in effluent sewerage, including sewerage system in sanitary sewage.3rd class: Business sewage exceedes nontoxic, the harmless sewage of sanitary sewage from commercial facility and some compositions.Such as sewage from catering business.Wash Clothing room sewage, animal feeding sewage, sewage etc. caused by hairdressing place.4th class:Overland flow is from rainwater, snow-broth, highway Lower water, water from city and industrial area etc., overland flow does not infilter soil, enters underground water along street and land. In water pollution caused by human production activity, water pollution most serious caused by industry.Such as industrial wastewater, it contains pollutant It is more, complicated component, not only it is not easy to purify in water, and handle also relatively difficult.Industrial wastewater, it is that industrial pollution causes water body The most important reason of pollution.It accounts for the major part of the pollutant of industry discharge.Pollutant contained by industrial wastewater is because of factory's kind Class is different and varies, even same class factory, production process is different, and the quality and quantity of its contained pollutant is also different.Work For industry in addition to the waste water of discharge is directly injected into water body and causes pollution, solid waste and waste gas also can polluted-waters.Agricultural pollution is first It is due to first that farming or the reclamation of wasteland make soil surface porosity, the rainfall in soil and also unstable landform, a large amount of silts are flowed into water, Increase the suspension in water.An also major reason is that agricultural chemicals, the usage amount of chemical fertilizer are increasing, and the agricultural chemicals used and change The only a small amount of attachment of fertilizer is absorbed, and remaining overwhelming majority remains in soil and floating in an atmosphere, by rainfall, by earth's surface Washing away into surface water and infiltration surface water for runoff forms pollution.Urban pollution resource is the urban life because urban population is concentrated Caused by sewage, rubbish and waste gas cause water pollution.Pollution of the urban pollution resource to water body is mainly sanitary sewage, and it is people The mixed liquor of caused various sewage in daily life, including the sewage of kitchen, washing room, bathroom and lavatory discharge.

The activity of sludge can not be kept during present sewage disposal so that the sludge after processing can not be used immediately, be needed Wait very long process.

The content of the invention

The activity of sludge can not be kept during it is an object of the invention to overcome above-mentioned existing sewage disposal so that after processing Sludge can not carry out using immediately, it is necessary to which the problem of waiting very long process, it is dirty to devise a kind of activity in sewage disposal Mud processing method, this method can keep the activity of sludge in Treatment of Sludge so that sludge can come into operation immediately, ensure Sludge meets requirement, reduces the stand-by period, and the activity of sludge can not be kept when solving existing sewage disposal so that place Sludge after reason can not carry out using, it is necessary to the problem of waiting very long process immediately.

The purpose of the present invention is achieved through the following technical solutions：Activated sludge treatment method in sewage disposal, activity The typical process flow of sludge discharges five part groups by aeration tank, second pond, aerating system, sludge reflux and excess sludge Into the activated sludge of waste water and backflow enters aeration tank and forms mixed liquor together, and aeration tank is a bioreactor, passes through exposure Gas equipment is filled with air, and the oxygen in air dissolves in mixed liquor, produces aerobic metabolism state, the muddy water mixed solution in subsequent aeration tank Second pond is flowed into, carries out mud-water separation, active pollution index sinks to bottom of pond, and the water after mud-water separation is heavy as the discharge two of processing water Pond, the sludge that second pond settles down return to aeration tank, referred to as returned sludge mostly as returned sludge, and remaining is then from heavy Shallow lake excludes in pond, and this partial sludge is referred to as excess sludge, and can be seen that activated sludge process to be made from above-mentioned flow forms a reality Processing method, sludge will also have good cohesion and settleability in addition to having the ability of oxidation and decomposing organic matter Can, so that activated sludge can be separated from mixed liquor, the water outlet clarified.

In summary, the beneficial effects of the invention are as follows：This method can keep the activity of sludge in Treatment of Sludge so that Sludge can come into operation immediately, ensure that sludge meets requirement, the stand-by period is reduced, when solving existing sewage disposal The activity of sludge can not be kept so that the sludge after processing can not carry out using, it is necessary to the problem of waiting very long process immediately.

Embodiment

With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to This.

Embodiment：

Activated sludge treatment method in sewage disposal, the typical process flow of activated sludge process is by aeration tank, second pond, exposure Gas system, sludge reflux and excess sludge discharge five parts composition, and waste water and the activated sludge to flow back enter aeration tank shape together Into mixed liquor, aeration tank is a bioreactor, and air is filled with by aerator, and the oxygen in air dissolves in mixed liquor, produces Raw aerobic metabolism state, the muddy water mixed solution in subsequent aeration tank flow into second pond, carry out mud-water separation, active pollution index sinks Enter bottom of pond, the water after mud-water separation is as processing water discharge second pond, and the sludge that second pond settles down is mostly as backflow Sludge returns to aeration tank, referred to as returned sludge, and remaining is then excluded from sedimentation basin, and this partial sludge is referred to as excess sludge, from Above-mentioned flow can be seen that activated sludge process to be made and form a practical processing method, and sludge is except that will have oxidation and divide Outside the ability for solving organic matter, also there are good cohesion and settling property, so that activated sludge can be separated from mixed liquor, The water outlet clarified.

This method can keep the activity of sludge in Treatment of Sludge so that sludge can come into operation immediately, ensure that Sludge meets requirement, reduces the stand-by period, and the activity of sludge can not be kept when solving existing sewage disposal so that processing Sludge afterwards can not carry out using, it is necessary to the problem of waiting very long process immediately.

It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to Any simply modification, the equivalent variations substantially made according to the technology of the present invention, method to above example, each fall within the present invention Protection domain within.

Claims (1)

1. the activated sludge treatment method in sewage disposal, it is characterised in that：The typical process flow of activated sludge process is by exposing Gas pond, second pond, aerating system, sludge reflux and excess sludge discharge the activated sludge one of five parts composition, waste water and backflow Rise and enter aeration tank and form mixed liquor, aeration tank is a bioreactor, is filled with air by aerator, the oxygen in air Mixed liquor is dissolved in, produces aerobic metabolism state, the muddy water mixed solution in subsequent aeration tank flows into second pond, carries out mud-water separation, Active pollution index sinks to bottom of pond, and the water after mud-water separation is as processing water discharge second pond, the sludge that second pond settles down Aeration tank, referred to as returned sludge are returned to mostly as returned sludge, remaining is then excluded from sedimentation basin, and this partial sludge claims For excess sludge, it can be seen that activated sludge process to be made from above-mentioned flow and form a practical processing method, sludge is except wanting Outside ability with oxidation and decomposing organic matter, also there are good cohesion and settling property, so that activated sludge can be from mixing Separated in liquid, the water outlet clarified.